Novel mixed metal oxides

ABSTRACT

A novel mixed metal molybdate useful as a hydroprocessing catalyst has been created. The hydroprocessing using the novel mixed metal molybdate material may include hydrodenitrification, hydrodesulfurization, hydrodemetallation, hydrodesilication, hydrodearomatization, hydroisomerization, hydrotreating, hydrofining, and hydrocracking.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims priority from Provisional Application No.62/267,874 filed Dec. 15, 2015, the contents of which are herebyincorporated by reference.

FIELD OF THE INVENTION

This invention relates to a new material useful as a hydroprocessingcatalyst. More particularly this invention relates to unique mixed metaloxides and their use as hydroprocessing catalysts. The hydroprocessingmay include hydrodenitrification, hydrodesulfurization,hydrodesilication, hydrodemetallation, hydrodearomatization,hydroisomerization, hydrotreating, hydrofining, and hydrocracking.

BACKGROUND

In order to meet the growing demand for petroleum products there isgreater utilization of sour crudes, which when combined with tighterenvironmental legislation regarding the concentration of nitrogen andsulfur within fuel, leads to accentuated refining problems. The removalof sulfur (hydrodesulfurization—HDS) and nitrogen(hydrodenitrification—HDN) containing compounds from fuel feed stocks istargeted during the hydrotreating steps of refining and is achieved bythe conversion of organic nitrogen and sulfur to ammonia and hydrogensulfide respectively.

Since the late 1940s the use of catalysts containing nickel (Ni) andmolybdenum (Mo) or tungsten (W) have demonstrated up to 80% sulfurremoval. See for example, V. N. Ipatieff, G.

S. Monroe, R. E. Schaad, Division of Petroleum Chemistry, 115^(th)Meeting ACS, San Francisco, 1949. For several decades now there has beenan intense interest directed towards the development of materials tocatalyze the deep desulfurization, in order to reduce the sulfurconcentration to the ppm level. Some recent breakthroughs have focusedon the development and application of more active and stable catalyststargeting the production of feeds for ultra low sulfur fuels. Severalstudies have demonstrated improved HDS and HDN activities throughelimination of the support such as, for example, Al₂O₃. Using bulkunsupported materials provides a route to increase the active phaseloading in the reactor as well as providing alternative chemistry totarget these catalysts.

More recent research in this area has focused on the ultra deepdesulfurization properties achieved by a Ni-Mo/W unsupported‘trimetallic’ material reported in, for example, U.S. Pat. No.6,156,695. The controlled synthesis of a broadly amorphous mixed metaloxide consisting of molybdenum, tungsten and nickel, significantlyoutperformed conventional hydrotreating catalysts. The structuralchemistry of the tri-metallic mixed metal oxide material was likened tothe hydrotalcite family of materials, referring to literature articlesdetailing the synthesis and characterization of a layered nickelmolybdate material, stating that the partial substitution of molybdenumwith tungsten leads to the production of a broadly amorphous phasewhich, upon decomposition by sulfidation, gives rise to superiorhydrotreating activities.

The chemistry of these layered hydrotalcite-like materials was firstreported by H. Pezerat, contribution à l'étude des molybdates hydratesde zinc, cobalt et nickel, C. R. Acad. Sci., 261, 5490, who identified aseries of phases having ideal formulas MMoO₄.H₂O, EHM₂O⁻(MoO₄)₂.H₂O, andE_(2−x)(H₃O)_(x)M₂O(MoO₄)₂ where E can be NH₄ ⁺, Na⁺ or K⁺ and M can beZn²⁺, Co²⁺ or Ni²⁺.

Pezerat assigned the different phases he observed as being and Φc, Φy orΦy and determined the crystal structures for Φx and Φy, however owing toa combination of the small crystallite size, limited crystallographiccapabilities and complex nature of the material, there were doubtsraised as to the quality of the structural assessment of the materials.During the mid 1970s, Clearfield et al attempted a more detailedanalysis of the Φx and Φy phases, see examples A. Clearfield, M. J.Sims, R. Gopal, Inorg. Chem., 15, 335; A. Clearfield, R. Gopal, C. H.Saldarriaga-Molina, Inorg. Chem., 16, 628. Single crystal studies on theproduct from a hydrothermal approach allowed confirmation of the Φxstructure, however they failed in their attempts to synthesize Φy andinstead synthesized an alternative phase, Na-Cu(OH)(MoO₄), see A.Clearfield, A. Moini, P. R. Rudolf, Inorg. Chem.,24, 4606.

The structure of Φy was not confirmed until 1996 when by Ying et al.Their investigation into a room temperature chimie douce synthesistechnique in the pursuit of a layered ammonium zinc molybdate led to ametastable aluminum-substituted zincite phase, prepared by thecalcination of Zn/Al layered double hydroxide (Zn₄Al₂(OH)₁₂CO₃.zH₂O).See example D. Levin, S. L. Soled, J. Y. Ying, Inorg. Chem.,1996, 35,4191-4197. This material was reacted with a solution of ammoniumheptamolybdate at room temperature to produce a highly crystallinecompound, the structure of which could not be determined throughconventional ab-initio methods. The material was indexed, yieldingcrystallographic parameters which were the same as that of an ammoniumnickel molybdate, reported by Astier, see example M. P. Astier, G. Dji,S. Teichner, J. Ann. Chim. (Paris), 1987, 12, 337, a material belongingto a family of ammonium-amine-nickel-molybdenum oxides closely relatedto Pezerat's materials. Astier did not publish any detailed structuraldata on this family of materials, leading to Ying et al reproducing thematerial to be analyzed by high resolution powder diffraction in orderto elucidate the structure. Ying et al named this class of materials‘layered transition-metal molybdates’ or LTMs.

SUMMARY OF THE INVENTION

A unique mixed metal oxide material has been produced and optionallysulfided, to yield an active hydroprocessing catalyst. The mixed metaloxide material has the formula:

MMo_(x)O_(y)

where ‘n’ varies from 0.1 to 2.0; ‘M’ is a metal selected from Mg, Mn,Fe, Co Ni, Cu, Zn, and mixtures thereof; ‘x’ varies from 0.5 to 1.5, orbetween 0.6 to 1.3 or from 0.8 to 1.2; ‘y’ is a number which satisfiesthe sum of the valences of M and Mo. The mixed metal oxide is poorlycrystalline but has a unique x-ray powder diffraction pattern showingthe peaks at the d-spacings listed in Table A.

TABLE A d(Å)  4.2-2.89 2.65-2.53 2.17-2.04 9*

Another embodiment involves a method of making a mixed metal oxidehaving the formula:

MMo_(x)O_(y)

where ‘n’ varies from 0.1 to 2.0; ‘M’ is a metal selected from Mg, Mn,Fe, Co Ni, Cu, Zn, and mixtures thereof; ‘x’ varies from 0.5 to 1.5, orbetween 0.6 to 1.3 or from 0.8 to 1.2; ‘y’ is a number which satisfiesthe sum of the valences of M and Mo. The mixed metal oxide is poorlycrystalline but has a unique x-ray powder diffraction pattern showingthe peaks at the d-spacings listed in Table A:

TABLE A d(Å)  4.2-2.89 2.65-2.53 2.17-2.04 1.53-1.45the method comprising: (a) forming a reaction mixture containing NH₄OH,H₂O, and sources of M and Mo; (b) adjusting the pH of the reactionmixture to a pH of from about 8.5 to about 10; (c) heating the reactionmixture to between 85° and 100° C. until the resultant pH is between 8.5and 9.5; (d) recovering a crystalline bis-ammonia metal molybdatepre-cursor having the formula:

(NH₃)_(2−n)M(OH₂)_(n)Mo_(x)O_(y)

where ‘n’ varies from 0.1 to 2.0; ‘M’ is a metal selected from Mg, Mn,Fe, Co Ni, Cu, Zn, and mixtures thereof; ‘x’ varies from 0.8 to 1.2; ‘y’is a number which satisfies the sum of the valences of M and Mo, thematerial is further characterized by a unique x-ray powder diffractionpattern showing the crystalline peaks in Table B:

TABLE B d(Å) I/I₀ % 7.49-7.28 vs  5.1-5.05 s  4.4-4.257 w 3.966-3.915 m 3.69-3.645 s 3.52-3.48 m 3.35-3.32 m 3.31-3.29 m  3.12-3.097 w   3-2.97m 2.76-2.73 m(e) heating the crystalline bis-ammonia metal molybdate pre-cursor at atemperature of from about 275° C. to about 350° C. for about 1 to about24 hours; and (f) recovering the mixed metal oxide.

Yet another embodiment involves a conversion process comprisingcontacting a feed with a catalyst at conversion conditions to give atleast one product, the catalyst comprising a mixed metal oxide havingthe formula:

MMo_(x)O_(y)

where ‘n’ varies from 0.1 to 2.0; ‘M’ is a metal selected from Mg, Mn,Fe, Co Ni, Cu, Zn, and mixtures thereof; ‘x’ varies from 0.5 to 1.5, orbetween 0.6 to 1.3 or from 0.8 to 1.2; ‘y’ is a number which satisfiesthe sum of the valences of M and Mo. The mixed metal oxide is poorlycrystalline but has a unique x-ray powder diffraction pattern showingthe peaks at the d-spacings listed in Table A:

TABLE A d(Å)  4.2-2.89 2.65-2.53 2.17-2.04 1.53-1.45

Additional features and advantages of the invention will be apparentfrom the description of the invention, drawings and claims providedherein.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is the X-ray powder diffraction pattern of the crystallinebis-ammonia metal molybdate pre-cursor prepared by boilingcrystallization as described in Examples 1 to 3.

FIG. 2 is the X-ray powder diffraction pattern of the mixed metal oxide,prepared by boiling crystallization followed by thermal decomposition asdescribed in Examples 1 to 3.

DETAILED DESCRIPTION OF THE INVENTION

The present invention relates to a mixed metal oxide, a process forpreparing the mixed metal oxide composition, and processes using themixed metal oxide as the catalyst. The composition has been given thedesignation UPM-5. The mixed metal oxide has an empirical formula:

MMo_(x)O_(y)

where ‘n’ varies from 0.1 to 2.0; ‘M’ is a metal selected from Mg, Mn,Fe, Co Ni, Cu, Zn, and mixtures thereof; ‘x’ varies from 0.5 to 1.5, orbetween 0.6 to 1.3 or from 0.8 to 1.2; ‘y’ is a number which satisfiesthe sum of the valences of M and Mo. The mixed metal oxide is poorlycrystalline but has a unique ex-ray powder diffraction pattern showingthe peaks in Table A. With the mixed metal oxide being poorlycrystalline, the intensity of each peak is weak or very weak.

TABLE A d(Å)  4.2-2.89 2.65-2.53 2.17-2.04 1.53-1.45

The mixed metal oxide is prepared by thermal decomposition of acrystalline bis-ammonia metal molybdate pre-cursor having an empiricalformula:

(NH₃)_(2−n)M(OH₂)_(n)Mo_(x)O_(y)

where ‘n’ varies from 0.1 to 2.0; ‘M’ is a metal selected from Mg, Mn,Fe, Co Ni, Cu, Zn, and mixtures thereof; ‘x’ varies from 0.8 to 1.2; ‘y’is a number which satisfies the sum of the valences of M and Mo, themixed metal oxide having a unique x-ray powder diffraction patternshowing the crystalline peaks in Table B.

TABLE B d(Å) I/I₀ % 7.49-7.28 vs  5.1-5.05 s  4.4-4.257 w 3.966-3.915 m 3.69-3.645 s 3.52-3.48 m 3.35-3.32 m 3.31-3.29 m  3.12-3.097 w   3-2.97m 2.76-2.73 m

The crystalline bis-ammonia metal molybdate pre-cursor is furthercharacterized by the x-ray powder diffraction pattern shown in FIG. 2.In one embodiment, the chemical formula of the crystalline pre-cursor is(NH₃)₂Ni(MoO₄). The crystalline precursor is characterized by having anextended network of M-O-M, where M represents a metal, or combination ofmetals listed above. The structural units repeat itself into at leasttwo adjacent unit cells without termination of the bonding. Thecomposition can have a one-dimensional network, such as, for example,linear chains.

The crystalline bis-ammonia metal molybdate pre-cursor is prepared bysolvothermal crystallization of a reaction mixture typically prepared bymixing reactive sources of molybdenum with the appropriate metal ‘M’with a solvent as well as a source of ammonia.

Specific examples of the molybdenum source which may be utilized in thisinvention include but are not limited to molybdenum trioxide, ammoniumdimolybdate, ammonium thiomolybdate, and ammonium heptamolybdate.Sources of other metals “M” include but are not limited to therespective halide, acetate, nitrate, carbonate, thiols and hydroxidesalts. Specific examples include nickel chloride, cobalt chloride,nickel bromide, cobalt bromide, magnesium chloride, zinc chloride,nickel nitrate, cobalt nitrate, iron nitrate, manganese nitrate, zincnitrate, nickel acetate, cobalt acetate, iron acetate, nickel carbonate,cobalt carbonate, zinc hydroxide, nickel hydroxide and cobalt hydroxide.

The source of ammonia may include but is not limited to ammoniumhydroxide, ammonium carbonate, ammonium bicarbonate, ammonium chloride,ammonium fluoride or a combination thereof.

Generally, the solvothermal process used to prepare the precursor ofthis invention involves forming a reaction mixture wherein all of thecomponents, such as for example, Ni, Mo, NH₄OH and H₂O are mixed insolution together. By way of one specific example, a reaction mixturemay be formed which in terms of molar ratios of the oxides is expressedby the formula:

AMO_(x): BMoO_(y): C(NH₃):H₂O

where ‘M’ is selected from the group consisting of iron, cobalt, nickel,manganese, copper, zinc and mixtures thereof; ‘A’ represents the molarratio of ‘M’ and may vary from 0.5 to 3, or from 0.75 and 2.0, or from1.0 and 1.5; ‘x’ is a number that satisfies the valency of M; ‘B’represents the molar ratio of ‘Mo’ and may vary from is from 0.5 to 3,or from 0.75 and 2.0, or from 1.0 and 1.5 ; and ‘y’ is a number thatsatisfies the valency of Mo; ‘C’ represents the molar ratio of NH₃ andmay vary from is from 0.1 to 5, or from 0.5 and 3, or from 1 and 2; themolar ratio of H₂O may vary from 10 to 1000, or from 20 and 500, or from25 and 100. It is necessary to adjust the pH of the mixture the pH ofthe reaction mixture to a pH of from about 8.5 to about 10. The pH ofthe mixture can be controlled through the addition of a base such asNH₄OH, quaternary ammonium hydroxides, amines, and the like.

Once formed, the reaction mixture is reacted at temperatures rangingfrom about 90° C. to about 100° C. for a period of time ranging from 30minutes to around 8 hours. In one embodiment the temperate range for thereaction is from about 95 ° C. to about 100° C. and in anotherembodiment the temperature range of from about 97° C. to about 100° C.In one embodiment, the reaction time is from about 4 to about 6 hours,and in another embodiment the reaction time is from about 4.5 to about5.5 hours. Beyond 8 hours the yield suffers. The reaction is carried outunder atmospheric pressure or in a sealed vessel under autogenouspressure. In one embodiment the synthesis may be conducted in an openvessel under reflux conditions. The crystalline bis-ammonia metalmolybdate compositions are characterized by their unique x-ray powderdiffraction pattern as shown in Table B above and in FIG. 1.

Once formed, the crystalline bis-ammonia metal molybdate pre-cursor mayhave a binder incorporated, where the selection of binder includes butis not limited to anionic and cationic clays such as hydrotalcites,pyroaurite-sjogrenite-hydrotalcites, montmorillonite and related clays,kaolin, sepiolites, silicas, alumina such as (pseudo) boehomite,gibbsite, calcined gibbsite, eta-alumina, zicronica, titania, aluminacoated titania, silica-alumina, silica coated alumina, alumina coatedsilicas and mixtures thereof, or other materials generally known asparticle binders in order to maintain particle integrity. These bindersmay be applied with or without peptization. The binder may be added tothe bulk crystalline bis-ammonia metal molybdate pre-cursor, and theamount of binder may range from about 1 to about 30 wt % of the finishedcatalysts or from about 5 to about 26 wt % of the finished catalyst. Thebinder may be chemically bound to the crystalline bis-ammonia metalmolybdate pre-cursor, or may be present in a physical mixture with thecrystalline bis-ammonia metal molybdate pre-cursor.

The crystalline bis-ammonia metal molybdate pre-cursor, with or withoutan incorporated binder can then be sulfided or pre-sulfided under avariety of sulfidation conditions, these include through contact of thecrystalline bis-ammonia metal molybdate pre-cursor with a sulfurcontaining feed as well as the use of a gaseous mixture of H₂S/H₂. Thesulfidation of the crystalline bis-ammonia metal molybdate pre-cursor isperformed at elevated temperatures, typically ranging from 50° C. to600° C., or from 150° C. to 500° C., or from 250° C. to 450° C.

Once formed, the crystalline bis-ammonia metal molybdate pre-cursor isthermally decomposed to form the mixed metal oxide of the inventionwhich in turn may be used as a catalyst in a variety of hydroprocessingprocesses. The thermal decomposition may be conducted in air, or othersuitable environments, at temperatures from about 275° C. to about 350°C., or from about 290° C. to about 320° C. and for about 1 to about 24hours; or for about 1 to about 8 hours; or from about 1 to about 4hours. Decomposition products from these one-dimensional chains of thepre-cursor may result in one-dimensional chains or a two dimensionalnetwork i.e. layers or a three dimensional framework solid.

If the crystalline bis-ammonia metal molybdate pre-cursor did not have abinder incorporated, or was not sulfided, either may be performed afterthe thermal decomposition of the crystalline bis-ammonia metal molybdatepre-cursor and formation of the mixed metal oxide. If the crystallinebis-ammonia metal molybdate pre-cursor did have a binder incorporated,or was already sulfided, additional binder may be added or additionalsulfiding may be conducted. The mixed metal oxide may have a binderincorporated, including but not limited to silica, alumina,silica-alumina and mixtures thereof, or other materials generally knownas particle binders in order to maintain particle integrity. The bindermay be added to the bulk mixed metal oxide, and the amount of binder mayrange from about 1 to about 30 wt % of the finished catalysts or fromabout 5 to about 26 wt % of the finished catalyst. The binder may bechemically bound to the mixed metal oxide decomposition product, or maybe present in a physical mixture with the mixed metal oxide.

The unsupported mixed metal oxide of this invention can be used as acatalyst or catalyst support in various hydrocarbon conversionprocesses. Hydroprocessing processes is one class of hydrocarbonconversion processes in which the crystalline bis-ammonia metalmolybdate material is useful as a catalyst. Examples of specifichydroprocessing processes are well known in the art and includehydrotreating or hydrofining, hydrogenation, hydrodearomatization,hydrodemetallation, hydrodesilication hydrocracking,hydrodenitrogenation, and hydrodesulfurization.

The operating conditions of the hydroprocessing processes listed abovetypically include reaction pressures from about 2.5 MPa to about 17.2MPa, or in the range of about 5.5 to about 17.2 MPa, with reactiontemperatures in the range of about 245° C. to about 440° C., or in therange of about 285° C. to about 425° C. Time with which the feed is incontact with the active catalyst, referred to as liquid hour spacevelocities (LHSV), should be in the range of about 0.1 h⁻¹ to about 10h⁻¹, or from about 2.0⁻¹ to about 8.0⁻¹. Specific subsets of theseranges may be employed depending upon the feedstock being used. Forexample when hydrotreating a typical diesel feedstock, operatingconditions may include from about 3.5 MPa to about 8.6 MPa, from about315° C. to about 410° C., from about 0.25/h to about 5/h, and from about84 Nm3 H2/m3 to about 850 Nm3 H2/m3 feed. Other feedstocks may includegasoline, naphtha, kerosene, gas oils, distillates, and reformate.

Examples are provided below so that the invention may be described morecompletely. These examples are only by way of illustration and shouldnot be interpreted as a limitation of the broad scope of the invention,which is set forth in the appended claims.

Patterns presented in the following examples were obtained usingstandard x-ray powder diffraction techniques. The radiation source was ahigh-intensity, x-ray tube operated at 45 kV and 35 mA. The diffractionpattern from the copper K-alpha radiation was obtained by appropriatecomputer based techniques. Powder samples were pressed flat into a plateand continuously scanned from 3° and 70° (2θ). Interplanar spacings (d)in Angstrom units were obtained from the position of the diffractionpeaks expressed as θ, where θ is the Bragg angle as observed fromdigitized data. Intensities were determined from the integrated area ofdiffraction peaks after subtracting background, “Io” being the intensityof the strongest line or peak, and “I” being the intensity of each ofthe other peaks. As will be understood by those skilled in the art thedetermination of the parameter 2θ is subject to both human andmechanical error, which in combination can impose an uncertainty ofabout ±0.4° on each reported value of 2θ. This uncertainty is alsotranslated to the reported values of the d-spacings, which arecalculated from the 2θ values. In some of the x-ray patterns reported,the relative intensities of the d-spacings are indicated by thenotations vs, s, m, and w, which represent very strong, strong, medium,and weak, respectively. In terms of 100(I/I₀), the above designationsare defined as: w=0-15, m=15-60: s=60-80 and vs=80-100

In certain instances the purity of a synthesized product may be assessedwith reference to its x-ray powder diffraction pattern. Thus, forexample, if a sample is stated to be pure, it is intended only that thex-ray pattern of the sample is free of lines attributable to crystallineimpurities, not that there are no amorphous materials present. As willbe understood to those skilled in the art, it is possible for differentpoorly crystalline materials to yield peaks at the same position. If amaterial is composed of multiple poorly crystalline materials, then thepeak positions observed individually for each poorly crystallinematerials would be observed in the resulting summed diffraction pattern.Likewise it is possible to have some peaks appear at the same positionswithin different, single phase, crystalline materials, which may besimply a reflection of a similar distance within the materials and notthat the materials possess the same structure.

EXAMPLE 1

In a 3 liter flask, 35.61 g of nickel carbonate (0.3 moles Ni) and 43.17g molybdenum trioxide (0.3 moles Mo) were added to 300 ml of waterforming a slurry. To this slurry, about 90 ml of a concentrated NH₄OHsolution was added in order to adjust the pH to 9.1. The solution wasrefluxed at about 100° C. During the heating the precipitates dissolvedto give a clear deep blue solution prior to the formation of a limegreen precipitate. After about 5 hrs, a green precipitate was observedsuspended in the blue about pH 9 solution. This precipitate was cooledto room temperature, filtered, washed with 90 ml of about 90° C. waterand then dried at 100° C. The dried precipitate was analyzed by x-raydiffraction as described above, and the X-ray powder diffraction patternis shown in FIG. 1; the phase was identified as (NH₃)₂Ni(MoO₄). Thebis-ammonia metal molybdate precursor, (NH₃)₂Ni(MoO₄), was heated in airat a temperature of about 300° C. for about 2 hours. The resulting mixedmetal oxide was analyzed by X-ray diffraction, and the X-ray powderdiffraction pattern is shown in FIG. 2.

EXAMPLE 2

In a 3 liter flask, 29.67 g of nickel carbonate (0.25 moles Ni) and 2.87g of manganese nitrate hexahydrate (0.01 moles of Mn) and 43.17 gmolybdenum trioxide (0.30 moles Mo) were added to 300 ml of waterforming a slurry. To this slurry, about 90 ml of a concentrated NH₄OHsolution was added in order to adjust the pH to 9.1. The solution wasrefluxed at about 100° C. During the heating the precipitates dissolvedto give a clear deep blue solution prior to the formation of the limegreen precipitate. After about 5hrs, a green precipitate was observedsuspended in the blue about pH 9 solution. This precipitate was cooledto room temperature, filtered, washed with 90 ml of about 90° C. waterand then dried at 100° C. The dried precipitate was analyzed by x-raydiffraction as described above, and the X-ray powder diffraction patternis shown in FIG. 1; the phase was identified as (NH₃)₂Ni(MoO₄).Thebis-ammonia metal molybdate precursor, (NH₃)₂Ni(MoO₄), was heated in airat a temperature of about 275° C. for 2 hours. The resulting mixed metaloxide was analyzed by X-ray diffraction, and the X-ray powderdiffraction pattern is shown in FIG. 2.

EXAMPLE 3

In a 1 liter flask, 10.14 g of basic nickel carbonate hydrate (0.1 molesNi) and 17.66 g of ammonium heptamolybdate (0.1 moles Mo) were added to200 ml of water and mixed thoroughly, after which 39.53 g ammoniumbicarbonate was added and the solution was refluxed at about 100° C.During the heating the precipitates dissolved to give a clear deep bluesolution prior to the formation of the lime green precipitate. Afterabout 2 hrs, a green precipitate was observed suspended in the blueabout pH 8 solution, this precipitate was cooled to room temperature,filtered, washed with 90 ml of about 90° C. water and then dried at 100°C. The dried precipitate was analyzed by x-ray diffraction as describedabove, and the X-ray powder diffraction pattern is shown in FIG. 1; thephase was identified as (NH₃)₂Ni(MoO₄). The bis-ammonia metal molybdateprecursor, (NH₃)₂Ni(MoO₄), was heated in air at a temperature of 300° C.for about 2 hours. The resulting mixed metal oxide was analyzed by X-raydiffraction, and the X-ray powder diffraction pattern is shown in FIG.2.

EMBODIMENTS

Embodiment 1 is a mixed metal oxide having the formula:

MMo_(x)O_(y)

where ‘n’ varies from 0.1 to 2.0; ‘M’ is a metal selected from Mg, Mn,Fe, Co Ni, Cu, Zn, and mixtures thereof; ‘x’ varies from 0.5 to 1.5, orbetween 0.6 to 1.3, or from 0.8 to 1.2; ‘y’ is a number which satisfiesthe sum of the valences of M and Mo; the mixed metal oxide having aunique x-ray powder diffraction pattern showing the peaks at thed-spacings listed in Table A:

TABLE A d(Å)  4.2-2.89 2.65-2.53 2.17-2.04 1.53-1.45

The mixed metal oxide of embodiment 1 wherein the mixed metal oxide ispresent in a mixture with at least one binder and wherein the mixturecomprises up to 25 wt % binder.

The mixed metal oxide of embodiment 1 wherein the binder is selectedfrom the group consisting of silicas, aluminas, and silica-aluminas.

The mixed metal oxide of embodiment 1 wherein M is nickel or cobalt.

The mixed metal oxide of embodiment 1 wherein M is nickel.

The mixed metal oxide of embodiment 1 wherein the mixed metal oxide issulfided.

Embodiment 2 is a method of making a mixed metal oxide having theformula:

MMo_(x)O_(y)

where ‘n’ varies from 0.1 to 2.0; ‘M’ is a metal selected from Mg, Mn,Fe, Co Ni, Cu, Zn, and mixtures thereof; ‘x’ varies from 0.5 to 1.5, orbetween 0.6 to 1.3, or from 0.8 to 1.2; ‘y’ is a number which satisfiesthe sum of the valences of M and Mo, the mixed metal oxide having aunique x-ray powder diffraction pattern showing the peaks at thed-spacings listed in Table A:

TABLE A d(Å)  4.2-2.89 2.65-2.53 2.17-2.04 1.53-1.45the method comprising: (a) forming a reaction mixture containing NH₄OH,H₂O, and sources of M and Mo; (b) adjusting the pH of the reactionmixture to a pH of from about 8.5 to about 10; (c) heating the reactionmixture to between 85° and 100° C. until the resultant pH is between 8.5and 9.5; (d) recovering a crystalline bis-ammonia metal molybdatepre-cursor having the formula:

(NH₃)_(2−n)M(OH₂)_(n)Mo_(x)O_(y)

where ‘n’ varies from 0.1 to 2.0; ‘M’ is a metal selected from Mg, Mn,Fe, Co Ni, Cu, Zn, and mixtures thereof; ‘x’ varies from 0.8 to 1.2; ‘y’is a number which satisfies the sum of the valences of M and Mo, themixed metal oxide having a unique x-ray powder diffraction patternshowing the crystalline peaks in Table B:

TABLE B d(Å) I/I₀ % 7.49-7.28 vs  5.1-5.05 s  4.4-4.257 w 3.966-3.915 m 3.69-3.645 s 3.52-3.48 m 3.35-3.32 m 3.31-3.29 m  3.12-3.097 w   3-2.97m 2.76-2.73 m(e) heating the crystalline bis-ammonia metal molybdate precursor at atemperature of from about 275° C. to about 350° C. for about 1 to about24 hours; and (f) recovering the mixed metal oxide.

The method of embodiment 2 wherein the recovering is by filtration orcentrifugation.

The method of embodiment 2 further comprising adding a binder to thecrystalline bis-ammonia metal molybdate precursor, or to the mixed metaloxide, or both.

The method of embodiment 2 wherein the binder is selected from the groupconsisting of aluminas, silicas, and alumina-silicas.

The method of embodiment 2 further comprising sulfiding the crystallinebis- ammonia metal molybdate precursor, or the mixed metal oxide, orboth.

The method of embodiment 2 wherein M is nickel or cobalt.

Embodiment 3 is a conversion process comprising contacting a feed with acatalyst at conversion conditions to give at least one product, thecatalyst comprising a mixed metal oxide having the formula:

MMo_(x)O_(y)

where ‘n’ varies from 0.1 to 2.0; ‘M’ is a metal selected from Mg, Mn,Fe, Co Ni, Cu, Zn, and mixtures thereof; ‘x’ varies from 0.5 to 1.5, orbetween 0.6 to 1.3 or from 0.8 to 1.2; ‘y’ is a number which satisfiesthe sum of the valences of M and Mo; the mixed metal having a uniquex-ray powder diffraction pattern showing the peaks at the d-spacingslisted in Table A:

TABLE A d(Å)  4.2-2.89 2.65-2.53 2.17-2.04 1.53-1.45

The process of embodiment 3 wherein the conversion process ishydroprocessing.

The process of embodiment 3 wherein the conversion process is selectedfrom the group consisting of hydrodenitrification, hydrodesulfurization,hydrodemetallation, hydrodearomatization, hydroisomerization,hydrodesilication, hydrotreating, hydrofining, and hydrocracking.

The process of embodiment 3 wherein the mixed metal oxide is present ina mixture with at least one binder and wherein the mixture comprises upto 25 wt % binder.

The process of embodiment 3 wherein the mixed metal oxide is sulfided.

The process of embodiment 3 wherein M is nickel or cobalt.

1. A mixed metal oxide having the formula:MMo_(x)O_(y) where ‘n’ varies from 0.1 to 2.0; ‘M’ is a metal selectedfrom Mg, Mn, Fe, Co Ni, Cu, Zn, and mixtures thereof; ‘x’ varies from0.5 to 1.5; ‘y’ is a number which satisfies the sum of the valences of Mand Mo; the mixed metal oxide having a unique x-ray powder diffractionpattern showing the peaks at the d-spacings listed in Table A: TABLE Ad(Å)  4.2-2.89 2.65-2.53 2.17-2.04 1.53-1.45


2. The mixed metal oxide of claim 1 wherein the mixed metal oxide ispresent in a mixture with at least one binder and wherein the mixturecomprises up to 25 wt % binder.
 3. The mixed metal oxide of claim 2wherein the binder is selected from the group consisting of silicas,aluminas, and silica-aluminas.
 4. The mixed metal oxide of claim 1wherein M is nickel or cobalt.
 5. The mixed metal oxide of claim 1wherein M is nickel.
 6. The mixed metal oxide of claim 1 wherein themixed metal oxide is sulfided.
 7. A method of making a mixed metal oxidehaving the formula:MMo_(x)O_(y) where ‘n’ varies from 0.1 to 2.0; ‘M’ is a metal selectedfrom Mg, Mn, Fe, Co Ni, Cu, Zn, and mixtures thereof; ‘x’ varies from0.5 to 1.5; ‘y’ is a number which satisfies the sum of the valences of Mand Mo; the mixed metal oxide having a unique x-ray powder diffractionpattern showing the peaks at the d-spacings listed in Table A: TABLE Ad(Å)  4.2-2.89 2.65-2.53 2.17-2.04 1.53-1.45

the method comprising: (a) forming a reaction mixture containing NH₄OH,H₂O, and sources of M and Mo; (b) adjusting the pH of the reactionmixture to a pH of from about 8.5 to about 10; (c) heating the reactionmixture to between about 85 to about 100° C. until the resultant pH isbetween 8.5 and 9.5; (d) recovering a crystalline bis-ammonia metalmolybdate pre-cursor having the formula:(NH₃)_(2−n)M(OH₂)_(n)Mo_(x)O_(y) where ‘n’ varies from 0.1 to 2.0; ‘M’is a metal selected from Mg, Mn, Fe, Co Ni, Cu, Zn, and mixturesthereof; ‘x’ varies from 0.5 to 1.5; ‘y’ is a number which satisfies thesum of the valences of M and Mo, the mixed metal oxide having a uniquex-ray powder diffraction pattern showing the crystalline peaks in TableB: TABLE B d(Å) I/I₀ % 7.49-7.28 vs  5.1-5.05 s  4.4-4.257 w 3.966-3.915m  3.69-3.645 s 3.52-3.48 m 3.35-3.32 m 3.31-3.29 m  3.12-3.097 w  3-2.97 m 2.76-2.73 m

(e) heating the crystalline bis-ammonia metal molybdate precursor at atemperature of from about 275° C. to about 350° C. for about 1 to about24 hours; and (f) recovering the mixed metal oxide.
 8. The method ofclaim 7 wherein the recovering is by filtration or centrifugation. 9.The method of claim 7 further comprising adding a binder to thecrystalline bis-ammonia metal molybdate precursor, or to the mixed metaloxide, or both.
 10. The method of claim 9 wherein the binder is selectedfrom the group consisting of aluminas, silicas, and alumina-silicas. 11.The method of claim 7 further comprising sulfiding the crystallinebis-ammonia metal molybdate precursor, or the mixed metal oxide, orboth.
 12. The method of claim 7 wherein M is nickel or cobalt.
 13. Aconversion process comprising contacting a feed with a catalyst atconversion conditions to give at least one product, the catalystcomprising a mixed metal oxide having the formula:MMo_(x)O_(y) where ‘n’ varies from 0.1 to 2.0; ‘M’ is a metal selectedfrom Mg, Mn, Fe, Co Ni, Cu, Zn, and mixtures thereof; ‘x’ varies from0.5 to 1.5; ‘y’ is a number which satisfies the sum of the valences of Mand Mo; the mixed metal oxide having a unique x-ray powder diffractionpattern showing the peaks at the d-spacings listed in Table A: TABLE Ad(Å)  4.2-2.89 2.65-2.53 2.17-2.04 1.53-1.45


14. The process of claim 13 wherein the conversion process ishydroprocessing.
 15. The process of claim 14 wherein the hydroprocessingprocess is selected from the group consisting of hydrodenitrification,hydrodesulfurization, hydrodemetallation, hydrodearomatization,hydroisomerization, hydrodesilication, hydrotreating, hydrofining, andhydrocracking.
 16. The process of claim 13 wherein the mixed metal oxideis present in a mixture with at least one binder and wherein the mixturecomprises up to 25 wt % binder.
 17. The process of claim 13 wherein themixed metal oxide is sulfided.
 18. The process of claim 13 wherein M isnickel or cobalt.